Glenn County

County in California

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Report created October 27, 2026 at www.firezones.info/county/021/glenn

  • Fire hazard severity zones

    Share of the land in each CAL FIRE hazard class

    13% Very High

    All of the Very High land is in the State Responsibility Area, where the State Fire Marshal's zones apply.

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  • Fire history

    Share of the land inside a recorded wildfire perimeter

    31% has burned

    Most recently the 2024 203 Fire, which burned 5 acres here, one of 86 fires on record.

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  • Power line fire risk

    Share of the land in the High Fire-Threat District

    39% Elevated

    Utilities may shut off power in the CPUC High Fire-Threat District in fire weather, and homes outside it can lose power when their lines run through it.

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Land by hazard class

  1. Very High 106,911 acres · State Responsibility Area 13%
  2. High 201,723 acres · 185,809 state, 15,914 local 24%
  3. Moderate 9,081 acres · 4,692 state, 4,389 local 1%
  4. Non-wildland 290,817 acres · Local Responsibility Area 34%
  5. Not mapped by CAL FIRE 240,741 acres · Mostly federal land 28%

849,273 acres of land in all, 297,413 in the State Responsibility Area and 311,119 in the Local. State zones are the ones the State Fire Marshal designated, in effect since 1 April 2024. Local zones are CAL FIRE's 2025 recommendation, which each city or county adopts by ordinance and can make stricter. How to read fire zones

Largest fires

  1. 2020 August Complex Of 1,032,700 acres in all · Cause: Lightning 188,848 acres
  2. 2018 Ranch Fire Of 410,202 acres in all · Cause: Miscellaneous 38,706 acres
  3. 1922 Grindstone Fire Of 39,806 acres in all · Cause: Miscellaneous 37,719 acres
  4. 2001 Trough Fire Of 24,927 acres in all · Cause: Miscellaneous 11,094 acres
  5. 1979 Squaw Ridge Fire 6,861 acres
  6. 1961 Logan Fire 6,707 acres
  7. 2003 Spanish Fire Cause: Campfire 6,050 acres
  8. 1952 Sevier Fire 4,877 acres
  9. 2006 Hunter Fire Of 16,234 acres in all · Cause: Lightning 3,121 acres
  10. 1921 Greens Valley Fire Cause: Campfire 2,573 acres

And 76 smaller fires. In all, 264,673 acres of Glenn County have burned. Acres are the land each fire burned here, and fires that crossed less than an acre are not counted. Some older or smaller fires may be missing, and a fire perimeter can include unburned patches. How to read fire history

Sources

Fire hazard severity zones
CAL FIRE Office of the State Fire Marshal
State map published 27 June 2025, local map 2 February 2026
Fire history
CAL FIRE Fire and Resource Assessment Program
Published 28 July 2026
Power line fire risk
California Public Utilities Commission
Published 23 February 2026

This site is independent and not affiliated with CAL FIRE or the CPUC, so for an official determination, check with the agency or your city or county. How we read the data

Nearby areas

Cities and towns in Glenn County

Unincorporated communities in Glenn County

ZIP codes in Glenn County

Neighboring counties

  1. Glenn County 13% Very High · this area
  2. Butte County 38% Very High
  3. Colusa County 23% Very High
  4. Lake County 45% Very High
  5. Mendocino County 36% Very High
  6. Tehama County 40% Very High